671758740722 has 4 divisors (see below), whose sum is σ = 1007638111086. Its totient is φ = 335879370360.

The previous prime is 671758740701. The next prime is 671758740727. The reversal of 671758740722 is 227047857176.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 521686953841 + 150071786881 = 722279^2 + 387391^2 .

It is not an unprimeable number, because it can be changed into a prime (671758740727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167939685179 + ... + 167939685182.

Almost surely, 2^671758740722 is an apocalyptic number.

671758740722 is a deficient number, since it is larger than the sum of its proper divisors (335879370364).

671758740722 is a wasteful number, since it uses less digits than its factorization.

671758740722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335879370363.

The product of its (nonzero) digits is 9219840, while the sum is 56.

The spelling of 671758740722 in words is "six hundred seventy-one billion, seven hundred fifty-eight million, seven hundred forty thousand, seven hundred twenty-two".